Governing means for internal-combustion engines.



No. 852,272. PATENTED APE.30,1907.

E. H'ENNIG` GOVEENING MEANS EOE INTERNAL ooMEUsTIoN ENGINES.

APPLICATION FILED MAR. 3, 1904.

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PATENTBD APR. 30, 1907.

R. HENNIG. GOVBRNING MEANS FOR INTERNAL GOMBUSTION ENGINES.

APPLICATION FILED MAR. 3, 1904.

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No. 852,272.- PATENTED APR. 30, 1907. R. HBNNIG. GOVERNING MEANS FOR INTERNAL GOMBUSTION ENGINES.

APPLIOATION IIl'wn MAR. 3. 1904.

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R. HENNIG. GOVERNING MEANS POR IN TERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR. 3. 1904.

No. 852,272. PATBNTED APR. 30, 19o?.

R. HBNNIG.

GOVERNING MEANS POR INTERNAL GOMBUSTION ENGINES. APPLICATION FILED MAR. s, 1904.

6 SHBETS-SHEET 6,

Y UNITED sTnTEs PATENT oEEroE.

RUDOLF HENNie, or ZWEIBECKEN, GERMANY.,

Specification of Letters Patent.

Patented April g 1907.

Application led March 3,1904 Serial No. 196,391.

To a/ZZ whom/ it muy concern:

Be it known that I, RUDOLF HENNIG, a subject of the Emperor of Germany, residing at Zweibrcken, Pfalz, Bavaria, Germany, have invented certain new an'd useful Improvements Relating to the Governing Means for Internal-Combustion Engines, of which the following isa specification.

This invention relates to a Yvalve-gear whereby the. admission valve of four-strokecycle explosion engines can be actuated in such a manner that it. either opens at a constant or definite point in the travel of the piston and closes at a variable point in the travel of the piston, or opens at a variable point in the travel of the piston and closes at a constant point, for the purpose ofgoverning the engine by varying the quantity of explosive mixture entering the cylinder and of improving the said mixture so as to obtain the best ignition. lf new the exhaust valve .of the engine opens ata constant V point in the travel of the piston and closes at a constant point before the opening of the admission valve, there plainly remains in the compres- Y sion space a constant quantity of exhaust gases from the previous stroke. According to the first alternative method of governing,

when the exhaust valve closes at the dead point and the admission-valve opens at the same place., with the slightest possible depressionin the atmospheric pressure there is a variable quantity of the explosive mixture to the constant quantity of Yexhaust gases in thev compression chamber or space. `According to. the second alternative method of governing, the admission valve', 'after the exhaust valve is closed at the dead poir t, in the iirst place likewise remains closed. The exhaust gases from the compression chamber expand alone and thus produce a partial vacuum in the cylinder, which is greater the later the admission valve opens in the outward motion of the piston. The explosive mixture will be mixed so much the m ire intimately the greater the partial vacuur i in the `Jcylinder and consequently the greatei iis velocity of entrance. Since the quantity of the explosive mixture necessarily de creases when the admission valve opens later, the most uniform mixture possible is pro duced, this being more especially the case with small charges and by this means very p erfect combustion is obtained. In both cases (a1- natedby the reference letters c, c2.

ternative methods of governing), the operations can be controlled during the admission of the explosive mixture in the most varied manner-by means of the valve gearing.

In the drawings, Figure 1 shows a foul'- stroke-cycle explosion engine provided with the new valve-gearing in vertical section. Figs. 2 and 3 show in elevation in two differ- Vent positions a governor for controlling the valve-gearing. Figs. 4 to 14 show the various positions of the parts of the valve-gear-A ing when the machine runs at full load, half load and unloaded, thusFigs. 4 to 8 show ythe various positions for the first alternative method of governing, and Figs. 9 to 13 the corresponding positions for the second:

method of governing. Fig. 14 shows thevalve-gearing in one of its positions. Figs. 15 and '16 are indicator diagrams which show the two methods of governing.

The admission valve x of the engine (Figs. 1 and lltflbears a piston valve y, the slots z of which, duringthe downward motion of the main admission valve-and the piston-valve, uncover ports for gas and air in the valve scat e. The admission valve se, through which the explosive-mixture enters, is moved by a twoar'med lever, the arms of which are desig- The upper point' ol' contact of the arm 4c with the valve has an adjustable spring arrangement g, in order to neutralize any inequalities there maybejin the operation of the valve gearing. .Asecond spring f assists the clos ing of the valve 'as' it tends to press the valve upward'. 'lhe arm z;2 is connected by a rod g with a co.'.itrolling levert, which receives an oscillating motion at the point A during the suction period. only. This motion is roduced by the roller o on the lever w and ya cam lckeycd on the auxiliary or eountershaft b, inv which arrangement the spring e provides for continuous contact of the roller o with the cam k.

Since thel countershaft b, which is positively driven by gear-wheels m, n, from the' sidel orwa.' shaft r1, only rotates at half the speed of the sideor way shaft and the crankshaft, it is clear that the controlling lever t with the lever w and roller o can only be caused to oscillate during-the suction period Aif the cam k be suitably formed and adjusted.

On the side or,way shaft a is mounted a IOO countershaft, gearing for. driving said counmyhand in presenc of .two subscrbngwitv tershjaft at half the speed of said side shft,l messes. i am mouIILed on said` Counterhsyft and act? Y RUDOLF HENNIQ In o n sald lbentlever, an adIIuSsIon-Valve, a,A

5 v'1in I connecting said actuating vlever and saidl v YVitnesses:

. admission-valve.,- I Y MICHAEL ZIMMERMANN,

" Int'stmony whereof I havehereuiloset FRIEDRICH SCIIAEDLER. 

